ULTRAFAST FIBRE LASERS

Junior research group at Leibniz Institute of Photonic Technology

OUR VISION

The group chooses a nontrivial approach to develop novel ultrashort pulse lasers systems in simple configurations with tailored and outstanding spectral and temporal properties by shaping the generation via internal nonlinear and dispersive phenomena and exploring all avenues of available optical fibre materials and geometries. Innovative laser sources will enable investigation of the fundamental physics of nonlinear phenomena and frequency conversion to mid-infrared, therefore matching fundamental vibration bands of target molecules.

OUR RESEARCH TOPICS

Follow our updates

Ultrafast Fibre Lasers is achieving more with our initiatives than ever before. We work on many exciting projects to help improve the lives of others, and are very proud of the progress we continue to make. Learn more about what we do, who we help, and how we work every day to promote positive change.

Learn More

Screenshot%25202020-03-09%2520at%252021_edited.jpg

REAL-TIME CHARACTERISATION OF ULTRASHORT PULSES

Advancing fundamental science and applications

MAMYSHEV OSCILLATOR-BASED ULTRAFAST FIBRE LASERS

Beyond conventional mode-locking

SHORT-WAVE AND MID-IR FIBRE LASERS

Discovering new operational wavelengths

RECENT PUBLICATIONS

REAL-TIME OBSERVATION OF THE OPTICAL SAGNAC EFFECT IN ULTRAFAST BIDIRECTIONAL FIBRE LASERS

APL Photonics 5, 016104 (2020)

The optical Sagnac effect sets fundamentals of the operating principle for ring laser and fiber optic gyroscopes, which are preferred instruments for inertial guidance systems, seismology, and geodesy. Operating at both high bias stability and angular velocity resolutions demands special precautions like dithering or multimode operation to eliminate frequency lock-in or similar effects introduced due to synchronization of counterpropagating channels. Recently, to circumvent these limitations, ultrashort pulsed radiation was suggested to supersede conventional continuous wave operation. Despite the ultrafast nature of ultrashort pulse generation, the interrogation of the Sagnac effect relies on highly averaging measurement methods. Here, we demonstrate the novel approach to the optical Sagnac effect visualization by applying real-time spatio-temporal intensity processing and time-resolved spectral domain measurements of ultrashort pulse dynamics in rotating the bidirectional ring fiber laser cavity. Our results reveal the high potential of application of novel methods of optical Sagnac effect measurements, allowing enhancement of rotation sensitivity and resolution by several orders of magnitude.

Link

BUILD-UP DYNAMICS IN BIDIRECTIONAL SOLITON FIBRE LASER

Photonics Research (accepted)

Bidirectional ultrafast fibre lasers present an attractive solution, enabling the generation of two mutually coherent ultrashort pulse trains in a simple and turnkey system. Still, the lack of a comprehensive numerical model describing steady-state bidirectional generation, and even less ultrafast soliton breakdowns and collisions, is obstructing the achievement of the performance compared with unidirectional lasers.In this paper, we have experimentally investigated real-time build-up dynamics of counter-propagating solitons in ultrafast ring Er-doped fibre laser via the dispersive Fourier transform methodology. We demonstrate that counter-propagating pulses experience independent build-up dynamics from modulation instability, undergoing breathing dynamics and diverging sub-ordinate pulse structures formation and annihilation to a stable bidirectional pulse train. Yet, interaction of pulses in the cavity presents the key underlying phenomenon driving formation evolution distinct form unidirectional pulse build-up. Our findings will provide physical foundations for bidirectional ultrafast fibre laser design to carry forward their application.

Link

KEY PEOPLE

DR MARIA CHERNYSHEVA

Junior research group leader

Maria obtained her PhD degree in Laser Physics from Fiber Optics Research Center of the Russian Academy of Sciences in 2014. She moved to UK shortly after where she worked at Aston University as Research Fellow. Maria has won three highly competitive and prestigious Fellowships in four years: Russian President Scholarship, Marie Skłodowska-Curie Individual Fellowship (EU Horizon2020) and Engnineering for Development Research Fellowship from Royal Academy of Engineering and Global Challenges Research Fund. From beginning of 2019 Dr. Chernysheva has been a leader of Junior Research Group “Ultrafast fibre lasers” at Leibniz-IPHT

DR OGUZHAN KARA

Marie S.-Curie Research Fellow

Oguzhan has received his PhD in Physics from Heriot Watt University, UK in 2018. Then he worked as a research associate in Ultrafast Optics Group (led by Prof. Derryck T. Reid) .His research interests include ultrashort fiber lasers, optical frequency combs, optical parametric oscillators, and midinfrared spectroscopy.

DENNIS CHRISTIAN KIRSCH

PhD student

Dennis joined IPHT in October 2019. He studied laser technology and photonics at the University of Applied Sciences Münster. He got MSc degree from the Laser Zentrum Hannover e.V. in 2017. Afterwards he worked as research associate at the Fraunhofer Heinrich Hertz Institute.